EP3512575B1 - Blood component sampling cassette, blood sampling circuit set, and blood component sampling system - Google Patents

Blood component sampling cassette, blood sampling circuit set, and blood component sampling system Download PDF

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Publication number
EP3512575B1
EP3512575B1 EP17777980.8A EP17777980A EP3512575B1 EP 3512575 B1 EP3512575 B1 EP 3512575B1 EP 17777980 A EP17777980 A EP 17777980A EP 3512575 B1 EP3512575 B1 EP 3512575B1
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EP
European Patent Office
Prior art keywords
reservoir
cassette
blood
biological component
main body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17777980.8A
Other languages
German (de)
English (en)
French (fr)
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EP3512575A1 (en
Inventor
Masatsugu Igarashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
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Terumo Corp
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Publication date
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Publication of EP3512575A1 publication Critical patent/EP3512575A1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/50—Details relating to control
    • A61M60/508—Electronic control means, e.g. for feedback regulation
    • A61M60/538—Regulation using real-time blood pump operational parameter data, e.g. motor current
    • A61M60/554—Regulation using real-time blood pump operational parameter data, e.g. motor current of blood pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/02—Blood transfusion apparatus
    • A61M1/0209—Multiple bag systems for separating or storing blood components
    • A61M1/0236—Multiple bag systems for separating or storing blood components with sampling means, e.g. sample bag or sampling port
    • A—HUMAN NECESSITIES
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    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/02—Blood transfusion apparatus
    • A61M1/0209—Multiple bag systems for separating or storing blood components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/02—Blood transfusion apparatus
    • A61M1/024—Means for controlling the quantity of transfused blood, e.g. by weighing the container and automatic stopping of the transfusion after reaching a determined amount
    • A61M1/0245—Means for controlling the quantity of transfused blood, e.g. by weighing the container and automatic stopping of the transfusion after reaching a determined amount combined with blood container shaking means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
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    • A—HUMAN NECESSITIES
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    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36224—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit with sensing means or components thereof
    • A—HUMAN NECESSITIES
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    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36226—Constructional details of cassettes, e.g. specific details on material or shape
    • A61M1/362261—Constructional details of cassettes, e.g. specific details on material or shape at least one cassette surface or portion thereof being flexible, e.g. the cassette having a rigid base portion with preformed channels and being covered with a foil
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    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
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    • A61M1/362262—Details of incorporated reservoirs
    • A—HUMAN NECESSITIES
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    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36226—Constructional details of cassettes, e.g. specific details on material or shape
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    • A61M1/362264—Details of incorporated filters the filter being a blood filter
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    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36226—Constructional details of cassettes, e.g. specific details on material or shape
    • A61M1/362266—Means for adding solutions or substances to the blood
    • A—HUMAN NECESSITIES
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    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3693—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits using separation based on different densities of components, e.g. centrifuging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/38—Removing constituents from donor blood and storing or returning remainder to body, e.g. for transfusion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/104—Extracorporeal pumps, i.e. the blood being pumped outside the patient's body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/247—Positive displacement blood pumps
    • A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
    • A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
    • A61M60/279—Peristaltic pumps, e.g. roller pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/30—Medical purposes thereof other than the enhancement of the cardiac output
    • A61M60/39—Medical purposes thereof other than the enhancement of the cardiac output for blood transfusion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/40—Details relating to driving
    • A61M60/424—Details relating to driving for positive displacement blood pumps
    • A61M60/438—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being mechanical
    • A61M60/441—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being mechanical generated by an electromotor
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    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/845—Constructional details other than related to driving of extracorporeal blood pumps
    • A61M60/847—Constructional details other than related to driving of extracorporeal blood pumps arranged in a cassette
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/845—Constructional details other than related to driving of extracorporeal blood pumps
    • A61M60/851—Valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0442—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers with means for adding or withdrawing liquid substances during the centrifugation, e.g. continuous centrifugation
    • A—HUMAN NECESSITIES
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    • A61M2202/00—Special media to be introduced, removed or treated
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    • A61M2205/00—General characteristics of the apparatus
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    • A61M2205/00—General characteristics of the apparatus
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    • A61M2205/123—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit with incorporated reservoirs
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    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow

Definitions

  • the present disclosure relates to a biological component sampling cassette attached to a separation device configured to separate a biological component from liquid containing at least one biological component.
  • the present disclosure relates to a blood component sampling cassette attached to a blood component separation device, a blood sampling circuit set, and a blood component sampling system.
  • Blood component sampling is a blood sampling method using a blood component sampling system (an apheresis system) to sample only specific blood components from the whole blood and return the remaining components to the body of the blood donor.
  • Document JP 2013-514863 A discloses a blood component sampling system configured to centrifuge whole blood extracted from a blood donor to sample platelet.
  • This blood component sampling system includes a blood sampling circuit set forming a circuit in which blood or blood components to be processed flow, and a centrifuge (a blood component separation device) attached to the blood sampling circuit set.
  • the blood sampling circuit set includes a blood sampling line having a blood sampling needle, a band-shaped channel (a separator) to which the whole blood is introduced, a plurality of bags configured to contain the blood components and the like, and a cassette connected to these elements through a plurality of tubes.
  • the cassette is provided with a plurality of flow paths including, for example, a line for introducing the blood from the blood donor, a line for transferring the blood component to each bag, and a retransfusion line for returning, to the blood donor, the blood components not to be sampled.
  • the cassette is attached to an attachment section provided at the blood component separation device.
  • a typical cassette has been made of hard resin, such as PET, not resistant to high heat in autoclave sterilization (so-called heat sterilization), and therefore, EOG sterilization has been performed as sterilization processing in manufacturing. EOG sterilization has problems such as great care and a high cost for sterilization for reasons such as that special processing gas is needed as compared to autoclave sterilization. Moreover, the typical cassette has been molded by a large-scale injection molding method, leading to a problem such as a high manufacturing cost.
  • the present disclosure has been made in view of the above-described problems, and the object of the present invention is to provide a blood component sampling cassette which can be more efficiently manufactured at lower cost as compared to a typical cassette, a blood sampling circuit set, a blood component sampling system.
  • the present disclosure relates to a biological component sampling cassette including a cassette main body provided with a plurality of flow paths and configured to be attachable to a separation device configured to separate a biological component from liquid containing at least one biological component.
  • the cassette main body is made of a soft material to which heat sterilization is applicable.
  • the plurality of flow paths include an introduction line configured to introduce the liquid, a biological component transfer line configured to transfer, to a sampling container, the biological component obtained by separation processing of the liquid, and a return line configured to transfer liquid other than the biological component obtained by the separation processing.
  • the return line is provided with a reservoir configured to temporarily store the liquid to be returned.
  • the reservoir is configured to be expandable/contractable, and is pressed by a return pump provided at the separation device to discharge the liquid from the reservoir.
  • the biological component is blood or a cultured or sampled cell.
  • the cassette main body is made of the soft material, and therefore, the cassette can be manufactured at lower cost as compared to the typical cassette made of the hard resin by large-scale injection molding.
  • the cassette main body is provided with the reservoir pressed by the return pump of the separation device to discharge the liquid.
  • the cassette main body may have a sensor pressing section configured to press a reservoir pressure sensor equipped at the separation device, thereby detecting an inner pressure of the reservoir.
  • the inner pressure of the reservoir can be detected with a simple configuration.
  • the sensor pressing section may be provided at the return line.
  • the inner pressure of the reservoir can be more precisely detected.
  • the reservoir may be expanded in a normal state.
  • a biological component sampling circuit set including a biological component sampling cassette having a cassette main body provided with a plurality of flow paths and configured to be attachable to a separation device configured to separate a biological component from liquid containing at least one biological component, a separation processing section connected to the biological component sampling cassette through a tube and having a processing chamber configured to separate the liquid into multiple biological components by actuation of the separation device, and a bag connected to the biological component sampling cassette through a tube.
  • the cassette main body is made of a soft material to which heat sterilization is applicable.
  • the plurality of flow paths include an introduction line configured to introduce the liquid, a biological component transfer line configured to transfer, to a sampling container, the biological component obtained by separation processing of the liquid, and a return line configured to transfer liquid other than the biological component obtained by the separation processing.
  • the return line is provided with a reservoir configured to temporarily store the liquid to be returned.
  • the reservoir is configured to be expandable/contractable, and is pressed by a return pump provided at the separation device to discharge the liquid from the reservoir.
  • the circuit set can be efficiently manufactured at low cost, and the device layout of the separation device can be simplified.
  • the present disclosure relates to a biological component sampling system including a separation device configured to separate a biological component from liquid containing at least one biological component, and a biological component sampling cassette configured to be attachable to the separation device.
  • the biological component sampling cassette includes a cassette main body provided with a plurality of flow paths.
  • the cassette main body is made of a soft material to which heat sterilization is applicable.
  • the plurality of flow paths include an introduction line configured to introduce the liquid, a biological component transfer line configured to transfer, to a sampling container, the biological component obtained by separation processing of the liquid, and a return line configured to transfer liquid other than the biological component obtained by the separation processing.
  • the return line is provided with a reservoir configured to temporarily store the liquid to be returned.
  • the reservoir is configured to be expandable/contractable, and is pressed by a return pump provided at the separation device to discharge the liquid from the reservoir.
  • the biological component sampling system can be efficiently manufactured at low cost, and the device layout of the separation device can be simplified.
  • the return pump equipped at the separation device may have a pressing plate configured to press the reservoir in a thickness direction.
  • the separation device may include a reservoir pressure detection mechanism configured to detect the inner pressure of the reservoir, and a control section configured to control operation of the pump based on the pressure detected by the reservoir pressure detection mechanism.
  • control section may control operation of the pump such that the inner pressure of the reservoir reaches a predetermined target pressure.
  • the cassette main body may have a sensor pressing section configured to press the reservoir pressure detection mechanism.
  • the cassette can be more efficiently manufactured at lower cost as compared to the typical cassette.
  • a blood component sampling system 10A is configured as a blood apheresis system, which continuously extracts blood (whole blood) from a blood donor to centrifuge the blood outside a body, thereby sampling specific blood components (platelet, red blood cells, plasma in the present embodiment) while returning, to the blood donor, blood components not to be sampled.
  • This blood component sampling system 10A includes a blood sampling circuit set 12 configured to store and circulate the blood components, and a centrifuge 14 (a blood component separation device) configured to apply centrifugal force to the blood sampling circuit set 12.
  • the blood sampling circuit set 12 has a channel 17 (a blood processing section) as a primary separator configured such that the whole blood extracted from the blood donor is introduced and centrifuged to the multiple blood components.
  • the centrifuge 14 has a rotor 78 configured to apply the centrifugal force to the channel 17.
  • An attachment groove 86 extending in a circumferential direction about the rotation axis "a" of the rotor 78 is formed at an upper surface 82a of the rotor 78, and the channel 17 is attachable to the attachment groove 86.
  • the blood sampling circuit set 12 is discarded after every use to prevent contamination and keep sanitation.
  • the blood sampling circuit set 12 includes a blood sampling/retransfusion section 16 having a blood sampling needle 15, the channel 17, a plurality of bags 18, and a blood component sampling cassette 22 (hereinafter referred to as a "cassette 22") connected to these elements through a plurality of tubes.
  • the plurality of bags 18 includes an ACD solution bag 24, an air bag 26, a platelet preservation solution bag 28, a PPP bag 30, a platelet bag 32, and a red blood cell bag 34.
  • the blood sampling/retransfusion section 16 is connected to the ACD solution bag 24 and the channel 17 through the cassette 22.
  • an ACD solution as an anticoagulant agent is, as default operation, supplied from the ACD solution bag 24 to the channel 17, and in this manner, coagulation of the whole blood is suppressed.
  • the channel 17 is connected to the cassette 22 through a channel connection line 36. Meanwhile, the plurality of bags 18 are connected to the cassette 22 through the plurality of tubes 20.
  • the channel 17 is formed in a belt-shaped bag.
  • the channel 17 is attached to the attachment groove 86 formed at the rotor 78 of the centrifuge 14, and is configured to allow introduction and flowing in/out of the blood.
  • the channel 17 is a soft bag having, on the inside thereof, a first chamber 40 (a processing chamber) to which the whole blood of the blood donor is supplied, and can be easily bent, folded, and rounded.
  • the first chamber 40 extends from one end portion 17a to another end portion 17b of the channel 17.
  • the one end portion 17a of the channel 17 is coupled to an introduction tube 46 forming part of the channel connection line 36.
  • the introduction tube 46 is connected to the cassette 22. During centrifugation processing, the whole blood introduced to the first chamber 40 is centrifuged by the centrifugal force while circulating from the one end portion 17a to the other end portion 17b.
  • the whole blood extracted from the blood donor through the blood sampling needle 15 flows from the one end portion 17a connected to the introduction tube 46 to the first chamber 40 of the channel 17 attached to the attachment groove 86.
  • the inflow whole blood circulates toward the other end portion 17b along an extension direction of the channel 17.
  • the whole blood receives the centrifugal force accompanied by rotation of the rotor 78, and therefore, is centrifuged while circulating.
  • the whole blood is, by centrifugation, separated into plasma (platelet poor plasma: PPP) as a light specific gravity component (a supernatant component), red blood cells (concentrated red cells) as a heavy specific gravity component (a sedimentation component), and buffy coat (BC) as an intermediate specific gravity component.
  • plasma platelet poor plasma: PPP
  • PPP platelet poor plasma
  • red blood cells concentrated red cells
  • a heavy specific gravity component a sedimentation component
  • buffy coat (BC) as an intermediate specific gravity component.
  • the other end portion 17b of the channel 17 is connected to first to third lead tubes 48a to 48c.
  • the first lead tube 48a and the second lead tube 48b are connected to the cassette 22.
  • the red blood cells separated by centrifugation in the first chamber 40 are introduced to the cassette 22 through the first lead tube 48a. Further, the plasma generated in the first chamber 40 is introduced to the cassette 22 through the second lead tube 48b.
  • the third lead tube 48c is connected to a concentrator 56 as a secondary separator having a second chamber 54.
  • the buffy coat generated in the first chamber 40 by centrifugation of the whole blood is introduced to the concentrator 56 through the third lead tube 48c.
  • the buffy coat contains a white blood cell component and platelet-rich plasma (a platelet-containing component).
  • the concentrator 56 is configured to introduce the buffy coat from the channel 17 to the second chamber 54 and further centrifuge the buffy coat by the centrifugal force accompanied by rotation of the rotor 78.
  • This concentrator 56 is formed in a conical shape with multiple steps. In a state in which the concentrator 56 is attached to the rotor 78, a top side of the conical shape is disposed further from the centrifugal center, and a bottom side of the conical shape is disposed closer to the centrifugal center.
  • the concentrator 56 separates the buffy coat into white blood cells as a heavy specific gravity component and platelet as a light specific gravity component (more specifically, a platelet-containing component containing plasma and platelet).
  • the white blood cells are captured by the multiple steps formed at the concentrator 56.
  • the platelet flows out to a relay tube 58 connected to an outlet (the bottom side) of the concentrator 56, and is introduced to the cassette 22.
  • the introduction tube 46, the first lead tube 48a, the second lead tube 48b, and the relay tube 58 are bundled by a bundling sheath 59.
  • the channel connection line 36 includes the introduction tube 46, the first to third lead tubes 48a to 48c, the concentrator 56, and the relay tube 58.
  • the ACD solution bag 24 is a bag configured to contain the ACD solution as the anticoagulant agent, and is connected to the cassette 22 through a tube 20a.
  • the air bag 26 is a bag configured to contain air discharged from a later-described reservoir 47 at a later-described priming process in retransfusion processing, and is connected to the cassette 22 through a tube 20b.
  • the platelet preservation solution bag 28 is a bag configured to contain a platelet preservation solution (a PAS solution), and is connected to the cassette 22 through a tube 20c.
  • the PPP bag 30 is a bag configured to contain the plasma obtained by centrifugation, and is connected to the cassette 22 through a tube 20d.
  • the platelet bag 32 is a bag configured to contain the platelet obtained by centrifugation, and is connected to the cassette 22 through a tube 20e.
  • the red blood cell bag 34 is a bag configured to contain the red blood cells obtained by centrifugation, and is connected to the cassette 22 through a tube 20h.
  • the cassette 22 includes a cassette main body 23 having a plurality of flow paths.
  • the cassette main body 23 has a first sheet 38 and a second sheet 39, these sheets being made of a soft material to which autoclave sterilization is applicable.
  • the first sheet 38 and the second sheet 39 overlap with each other in a thickness direction, and are bonded to each other.
  • the soft material which forms the first sheet 38 and the second sheet 39 and to which autoclave sterilization is applicable means that the soft material exhibits heat resistance against heat (e.g. 121°C) of autoclave sterilization for equal to or longer than a predetermined period of time and exhibits water vapor permeability allowing introduction of water vapor as processing gas to the flow paths in the cassette 22.
  • a soft material includes, for example, vinyl chloride and polyolefin.
  • the plurality of flow paths are formed between the first sheet 38 and the second sheet 39.
  • the way of bonding the first sheet 38 and the second sheet 39 includes, for example, fusion (high-frequency fusion, thermal fusion, and the like) and adhesion.
  • the cassette 22 has a plurality of port members 41 arranged at a peripheral edge portion of the cassette main body 23, and tubes (the tubes 20 and the like) are each connected to these port members 41.
  • the plurality of flow paths formed at the cassette main body 23 at least include an introduction line 42 configured to introduce the blood sampled from the blood donor, a blood component transfer line 43 configured to transfer, to sampling containers (the PPP bag 30, the platelet bag 32, the red blood cell bag 34), the blood components obtained by the processing of separating the blood, and a retransfusion line 44 configured to transfer, to the blood donor, the blood components not to be sampled.
  • the plurality of flow paths further include an ACD solution line 45 configured to transfer the ACD solution to the blood sampling/retransfusion section 16.
  • An inflow side (a flow path element 42a) of the introduction line 42 is connected to a tube of the blood sampling/retransfusion section 16.
  • An outflow side (a flow path element 42b) of the introduction line 42 is connected to the introduction tube 46 connected to the channel 17.
  • the blood sampling/retransfusion section 16 and the channel 17 are connected through the introduction line 42.
  • an expandable/ contractable balloon section 50 is provided on the introduction line 42.
  • the balloon section 50 is a portion configured to press a later-described centrifugal pressure sensor 94 (see Fig. 6 ) provided at the centrifuge 14.
  • the first sheet 38 and the second sheet 39 partially form a wall of the balloon section 50.
  • a lumen of the balloon section 50 communicates with the flow path element 42a and the flow path element 42b.
  • the blood component transfer line 43 has a first line 51 and a second line 52 independent from each other.
  • a flow path element 51a forming an inflow side of the first line 51 is connected to the first lead tube 48a connected to the channel 17.
  • the first line 51 includes, on an outflow side thereof, flow path elements 51b, 51c branched from the flow path element 51a.
  • the flow path element 51b is connected to the tube 20h connected to the red blood cell bag 34.
  • the flow path element 51c is connected to a tube 20g connected to the reservoir 47.
  • the second line 52 is connected to the second lead tube 48b, the relay tube 58, and the tubes 20c to 20f.
  • the second line 52 has a flow path element 52a connected to the second lead tube 48b, a flow path element 52b branched from the flow path element 52a, a flow path element 52c connected to the tube 20d connected to the PPP bag 30 and continuing to the flow path element 52b, and a flow path element 52d connected to the tube 20c connected to the platelet preservation solution bag 28 and continuing to the flow path element 52b.
  • the second lead tube 48b is connected to an inflow side of the flow path element 52a.
  • the tube 20c is connected to an inflow side of the flow path element 52d.
  • the second line 52 further has a flow path element 52e connected to the relay tube 58, a flow path element 52f and a flow path element 52g branched from the flow path element 52e, a flow path element 52h continuing to the flow path element 52f and connected to the tube 20e connected to the platelet bag 32, and a flow path element 52i branched from the flow path element 52a and continuing to the flow path element 52f and the flow path element 52h.
  • the tube 20f connected to the reservoir 47 is connected to the flow path element 52g.
  • the relay tube 58 is connected to an inflow side of the flow path element 52e.
  • the plasma separated in the channel 17 can be transferred to the PPP bag 30 through the flow path elements 52a to 52c in the cassette 22. Further, the plasma separated in the channel 17 can be transferred to the reservoir 47 through the flow path elements 52a, 52i, 52f, 52g in the cassette 22.
  • the platelet separated in the channel 17 can be transferred to the platelet bag 32 through the flow path elements 52e, 52f, 52h in the cassette 22.
  • the platelet preservation solution can be transferred to the platelet bag 32 through the flow path elements 52d, 52b, 52i, 52h in the cassette 22.
  • the reservoir 47 is provided at the retransfusion line 44.
  • the reservoir 47 is a container configured to temporarily store the blood components to be returned to the blood donor.
  • the red blood cells and the plasma are introduced to the reservoir 47 through the tubes 20f, 20g, and are temporarily stored in the reservoir 47. Uncollected blood components are returned from the reservoir 47 to the blood donor during or after the centrifugation processing.
  • the first sheet 38 and the second sheet 39 partially form the reservoir 47, and the reservoir 47 is configured to be expandable/contractable.
  • the reservoir 47 is expandable/contractable in the thickness direction of the cassette main body 23.
  • the blood components in the reservoir 47 are discharged in such a manner that the reservoir 47 is pressed by a retransfusion pump 49 provided at a cassette holding section 90 (see Fig. 4 ) of the centrifuge 14.
  • the reservoir 47 is expanded in a normal state.
  • the capacity of the reservoir 47 is set to, e.g., 30 to 100 mL, and preferably 50 to 70 mL.
  • the reservoir 47 is connected to the tube 20f through a flow path element 44a, and is connected to the tube 20g through a flow path element 44b.
  • a sensor pressing section 61 configured to press a reservoir pressure sensor 57 (see Fig. 4 ) provided at the centrifuge 14 is provided at a flow path joint between the flow path element 44a and the flow path element 44b.
  • the sensor pressing section 61 is similarly configured as in the above-described balloon section 50. That is, the first sheet 38 and the second sheet 39 partially form the sensor pressing section 61, and the sensor pressing section 61 is configured in a balloon shape expandable/contractable according to an inner pressure.
  • the reservoir 47 is connected to the air bag 26 through a flow path element 44c and the tube 20b.
  • the blood sampling/retransfusion section 16 is connected to an outflow side of the retransfusion line 44.
  • a filter member 60 configured to remove a foreign material, such as coagulated blood clots, contained in the blood components having passed through the reservoir 47 is disposed on the flow path of the retransfusion line 44 in the cassette main body 23. In the retransfusion line 44, the filter member 60 is disposed on the downstream side of the reservoir 47.
  • the flow paths (including the reservoir 47) provided at the cassette 22 may be flow paths configured to open in the normal state.
  • flow path formation portions of the first sheet 38 and the second sheet 39 expand in a shape raised in the thickness direction of the cassette 22.
  • the flow paths provided at the cassette 22 may be flow paths configured to close when the positive pressure is not applied and to open when the positive pressure is applied. In the case of such flow paths, when the positive pressure is not applied, the flow path formation portions of the first sheet 38 and the second sheet 39 are substantially flat, and when the positive pressure is applied, the flow path formation portions of the first sheet 38 and the second sheet 39 expand in the raised shape.
  • cassette/tube assembly 62 an assembly including the cassette 22 and the tubes (the tubes 20 and the like) connected to the cassette 22 will be hereinafter referred to as a "cassette/tube assembly 62.”
  • the tubes (the inflow-side tubes) (excluding the tube 20g) connected to inflow sides of the plurality of flow paths are, in Fig. 2 , provided with pump operation sections 64 on which pumps 96 provided at the centrifuge 14 operate.
  • Each pump operation section 64 is disposed on the inflow side of an associated one of the flow paths formed in the cassette 22.
  • the positive pressure is applied to a downstream side of the pump operation section 64 in an associated one of the flow paths formed in the cassette main body 23.
  • the tube 20a connected to an inflow side of the ACD solution line 45, a tube 20i connected to the inflow side of the introduction line 42, and the tubes (the tube 20c, the second lead tube 48b, and the relay tube 58) connected to an inflow side of the second line 52 are provided with the pump operation sections 64.
  • the pump operation sections 64 are portions of the tubes 20a, 20c, 20i, the second lead tube 48b, and the relay tube 58 attached (contacting) to the pumps 96.
  • the pump operation sections 64 may be in the form of a normal tube, and do not necessarily have a special configuration.
  • the cassette 22 is provided with a plurality of clamp operation sections 65 on which a plurality of clamps 92 provided at the centrifuge 14 operate.
  • each clamp operation section 65 contacts or faces an associated one of the clamps 92.
  • the clamp operation sections 65 are each provided at portions of the cassette 22 forming the flow path elements 51b, 51c of the first line 51, portions of the cassette 22 forming the flow path elements 52c, 52g, 52h, 52i of the second line 52, and portions of the cassette 22 forming the flow path elements 44c, 44d (see Fig. 3 ) of the retransfusion line 44.
  • each flow path formed in the cassette 22 the number of provided bags, and arrangement of the provided bags are not limited to those of the illustrated configuration described above, and may be modified according to the types of blood components to be sampled and the method for using these components.
  • the red blood cell bag 34 may be omitted.
  • the ACD solution bag 24 may be detached from the cassette 22 in a default state, and upon use by a user, may be connected to the cassette 22 in such a manner that the tube 20a with a connection needle is connected to the ACD solution bag 24.
  • the centrifuge 14 is a device repeatedly used in blood component sampling, and is equipped at medical facilities, blood sampling vehicles, and the like.
  • the centrifuge 14 includes a box-shaped device main body 70 formed relatively long in a height direction, a monitor 74 supported by a support column 88 protruding upward from an upper rear side of the device main body 70, an attachment section 76 configured to allow attachment of the cassette/tube assembly 62 of the blood sampling circuit set 12, a cover body 77 configured to open/close and to cover the attachment section 76 when closed, a centrifugal unit 72 housed in the device main body 70, and a door 81 configured to open/close on a front side of the device main body 70.
  • the device main body 70 has the function of hanging and holding the plurality of bags 18 of the blood sampling circuit set 12 and controlling centrifugation of the blood extracted into the blood sampling circuit set 12.
  • the monitor 74 is, for example, of a touch panel type, and functions not only as a display unit configured to display, e.g., an operation state of the device main body 70 upon blood centrifugation, but also an input unit configured to input an instruction for operating the device main body 70.
  • the attachment section 76 is disposed on an upper side of the device main body 70.
  • the attachment section 76 has the cassette holding section 90 configured to hold the cassette 22, and the plurality of clamps 92 (92a to 92h) configured to press the clamp operation sections 65 provided at the cassette 22.
  • the attachment section 76 further has the centrifugal pressure sensor 94 configured to detect a centrifugal pressure, the pumps 96 operating on the tubes connected to the inflow sides of the plurality of flow paths provided at the cassette 22, the retransfusion pump 49 operating on the reservoir 47, and the reservoir pressure sensor 57 (a reservoir pressure detection mechanism) configured to detect the inner pressure of the reservoir 47.
  • the cassette holding section 90 may include a plurality of pins, and may be configured to hold the cassette 22 when the plurality of pins are inserted into respective holes provided at a peripheral edge portion of the cassette 22.
  • the cassette holding section 90 may be configured to hold the cassette 22 by sandwiching the peripheral edge portion of the cassette 22.
  • the plurality of clamps 92 (92a to 92h) are provided at the cassette holding section 90.
  • Each clamp 92 is operable to move back and forth in the thickness direction (a direction indicated by an arrow A of Fig. 5A ) of the cassette 22 in a state in which the clamp 92 is held by the cassette holding section 90, and is disposed corresponding to an associated one of the plurality of clamp operation sections 65 provided at the cassette 22.
  • the centrifugal pressure sensor 94 is provided at the cassette holding section 90.
  • the centrifugal pressure sensor 94 has a detection bar 98 configured to contact the balloon section 50 of the cassette 22 held by the cassette holding section 90.
  • the detection bar 98 is movable in the thickness direction (the A direction) of the cassette 22, and is pressed by the balloon section 50 expanding according to the pressure. Consequently, the centrifugal pressure (the pressure in the processing chamber 40) based on the position of the detection bar 98 can be detected.
  • the plurality of pumps 96 are arranged near the cassette holding section 90 with the plurality of pumps 96 being attached to the tubes 20a, 20c, 20i, the second lead tube 48b, and the relay tube 58 connected to the inflow sides of the ACD solution line 45, the introduction line 42, and the second line 52 of the blood component transfer line 43 (also see Fig. 4 ).
  • the pumps 96a to 96d operating on the tubes 20a, 20c, the second lead tube 48b, and the relay tube 58 are in the form of a roller pump configured to circulate liquid (the blood components and the like) in the tubes by repeatedly pressing the tubes.
  • the pumps 96a to 96d in the form of the roller pump each include a rotatably-drivable wheel 100 and rollers 102 rotatably provided at intervals in the circumferential direction at an outer peripheral portion of the wheel 100.
  • Each roller 102 moves in the circumferential direction to crush the tube while the wheel 100 is rotating.
  • the liquid circulates in the tube.
  • the pumps 96a to 96d in the form of the roller pump are placed such that the rotation axis of each wheel 100 is parallel to an outer housing surface 70a forming the attachment section 76, and the outer peripheral portion of each wheel 100 is partially exposed through the outer housing surface 70a.
  • the cassette 22 is held by the cassette holding section 90 and the cover body 77 is closed in a state in which the tubes (the tubes 20 and the like) provided with the above-described pump operation sections 64 are placed on the roller pumps (the wheels 100), the tubes (the tubes 20 and the like) are sandwiched between the cover body 77 and each roller pump.
  • roller pumps (the pumps 96a to 96d) may be placed such that the rotation axis of each wheel 100 is perpendicular to the outer housing surface 70a forming the attachment section 76.
  • the pump 96e operating on the tube 20i connected to the inflow side of the introduction line 42 is a pump (hereinafter referred to as a "blood sampling pump 96e") configured to extract the blood from the blood donor to transfer the blood to the channel 17 through the introduction line 42.
  • the blood sampling pump 96e may be a roller pump similar to the other pumps 96a to 96d, or may be a pump (a diaphragm pump and the like) in other forms.
  • the diaphragm pump when employed as the blood sampling pump 96e, two check valves are provided at an interval at the tube 20i, and a diaphragm portion of the diaphragm pump is connected to the tube 20i between the two check valves. Further, the diaphragm pump can also serve as a donor pressure sensor configured to detect the blood pressure (the donor pressure) of the blood donor based on the amount of displacement of the diaphragm portion.
  • the retransfusion pump 49 is configured to return the blood components from the reservoir 47 to the blood donor by pressing the reservoir 47 with the cassette 22 being attached to the attachment section 76.
  • the retransfusion pump 49 has a pressing plate 49a configured to press the reservoir 47 in the thickness direction, a movable support section 49b configured to support the pressing plate 49a, and a servomotor 49c configured to drive the movable support section 49b.
  • the pressing plate 49a is displaceable in the thickness direction of the cassette 22. In a state in which the cassette 22 is held by the cassette holding section 90 and the cover body 77 is closed, the pressing plate 49a and the cover body 77 sandwich the reservoir 47, and the pressing plate 49a displaces toward the cover body 77. In this manner, the pressing plate 49a presses the substantially entirety of a liquid housing section of the reservoir 47 in the thickness direction.
  • the pressing plate 49a has a pressing surface 49d configured to contact the reservoir 47 upon pressing of the reservoir 47. In Fig. 7 , the pressing surface 49d is formed flat. Note that the pressing surface 49d may be formed in a curved shape.
  • the planar shape of the pressing plate 49a is larger than that of the reservoir 47.
  • the pressing plate 49a can press the substantially entirety of the reservoir 47 from one side (a side close to the second sheet 39) of the reservoir 47 in the thickness direction.
  • the planar shape of the pressing plate 49a may have the substantially same size as that of the reservoir 47.
  • the movable support section 49b protrudes from a back surface (a surface opposite to the pressing surface 49d) of the pressing plate 49a, and is supported to move back and forth in the thickness direction of the cassette 22 by a not-shown guide section provided at the centrifuge 14.
  • the servomotor 49c is configured to drive the movable support section 49b through an optional power transmission mechanism 49e.
  • the servomotor 49c may be a rotary motor or a linear motor.
  • the servomotor 49c is controlled by a control section 71 provided at the centrifuge 14.
  • the control section 71 is configured to control operation of the retransfusion pump 49 based on the pressure detected by the reservoir pressure sensor 57.
  • the reservoir pressure sensor 57 is similarly configured as in the above-described centrifugal pressure sensor 94 (see Fig. 6 ). That is, the reservoir pressure sensor 57 has a detection bar configured to contact the sensor pressing section 61 of the cassette 22 held by the cassette holding section 90. The detection bar is movable in the thickness direction of the cassette 22, and is pressed by the sensor pressing section 61 (see Fig. 3 ) expanding according to the pressure. Consequently, the inner pressure of the reservoir 47 can be detected based on the position of the detection bar.
  • the form of the reservoir pressure detection mechanism is not limited to the above-described reservoir pressure sensor 57 pressed by the sensor pressing section 61.
  • a reservoir pressure detection mechanism in another form may be configured to detect the inner pressure of the reservoir 47 based on the torque of the servomotor 49c.
  • the control section 71 stores a map indicating a relationship between the torque and the inner pressure, and detects the inner pressure of the reservoir 47 with reference to the map.
  • one end side of the cover body 77 is rotatably coupled to the device main body 70 through hinge portions 104.
  • the cover body 77 is configured to lock the closed state.
  • the cover body 77 is preferably made of a hard material. Further, when the cover body 77 is made of a transparent material, the cassette/tube assembly 62 attached to the attachment section 76 can be visually checked even in the closed state of the cover body 77, and the state of the cassette/tube assembly 62 can be checked.
  • the cover body 77 of the illustrated example is configured such that a single plate-shaped body covers a target area.
  • the cover body 77 may have a plurality of plate-shaped bodies (e.g., two bodies) configured to open/close independently, and may be configured to cover the target area with the plurality of plate-shaped bodies.
  • the centrifugal unit 72 has the rotor 78 rotatable about the vertical axis, and a drive section 80 (a motor) configured to rotatably drive this rotor 78.
  • the rotor 78 has an upper rotor 82 to which the channel 17 is attached, and a lower rotor 84 coaxially rotatable with the upper rotor 82.
  • the upper rotor 82 is rotatable relative to the lower rotor 84, and the attachment groove 86 for attachment of the channel 17 is provided at the upper surface 82a of the upper rotor 82.
  • the lower rotor 84 is coupled to an output shaft of the drive section 80.
  • the upper rotor 82 and the lower rotor 84 are coupled together by a pinion assembly 85 such that the upper rotor 82 rotates at a double speed as compared to that of the lower rotor 84.
  • the pinion assembly 85 has, for example, an intermediate gear supported on the lower rotor 84 to rotate about the axis perpendicular to the rotation axis "a" of the rotor 78, a lower gear provided at a non-rotation portion and configured to engage with a lower portion of the intermediate gear, and an upper gear provided at the upper rotor 82 about the rotation axis "a".
  • This pinion assembly 85 rotates the upper rotor 82 two times in every rotation of the lower rotor 84. Consequently, even when the channel 17 is continuously rotated by the rotor 78 for centrifugation, twisting among the channel 17 and the plurality of tubes, such as the introduction tube 46, connected to the channel 17 falls within a predetermined range. Thus, a rotary seal between the channel 17 and each of the plurality of tubes such as the introduction tube 46 is not necessary.
  • the cassette 22 having the above-described configuration can be manufactured by the following manufacturing method, for example.
  • the method for manufacturing the cassette 22 includes the molding process of overlapping the first sheet 38 and the second sheet 39 with each other and welding the first sheet 38 and the second sheet 39 to form the plurality of flow paths between the first sheet 38 and the second sheet 39, thereby molding the cassette 22 including the cassette main body 23; and the sterilization process of sterilizing the cassette 22 obtained by the molding process.
  • sheet-shaped materials 110 as the materials of the first sheet 38 and the second sheet 39 are, for example, fed from two material rolls 112a, 112b, the sheet-shaped materials 110 each being wound around the material rolls 112a, 112b.
  • the sheet-shaped materials 110 are supplied together with assembly components (the filter member 60, the port members 41) to a bonding device 114 such as a high-frequency fusion device.
  • the bonding device 114 includes upper and lower molds 115 and 116.
  • the bonding device 114 bonds, together with the assembly components, the two overlapping sheet-shaped materials 110, thereby molding the cassette 22 provided with the plurality of flow paths.
  • the tubes (the tubes 20 and the like) may be connected.
  • the plurality of flow paths (including the above-described reservoir 47) expanded (protruding) in the thickness direction of the cassette 22 are formed by blow molding.
  • the upper and lower molds 115, 116 are provided with grooves corresponding to the shapes of the plurality of flow paths.
  • one or more blow nozzles are sandwiched between the upper and lower molds 115, 116, and then, blow molding gas is blown into between the two sheet-shaped materials 110.
  • the plurality of flow paths expanding in the thickness direction of the cassette 22 are formed.
  • the cassette 22 obtained by the molding process is subjected to autoclave sterilization.
  • the cassette 22 is made of a material resistant to heat of autoclave sterilization, and therefore, does not melt due to heat in sterilization. Further, the cassette 22 is made of a material exhibiting water vapor permeability, and therefore, water vapor as processing gas for autoclave sterilization is guided into the flow paths of the cassette 22. Consequently, the cassette 22 can be favorably sterilized.
  • the entirety of the blood sampling circuit set 12 including the plurality of bags 18 may be subjected to autoclave sterilization. Consequently, the blood sampling circuit set 12 can be efficiently sterilized.
  • the blood sampling circuit set 12 is attached to the centrifuge 14 as preparation (setup) for blood component sampling from the blood donor by means of the blood component sampling system 10A illustrated in Fig. 1 .
  • the cassette/tube assembly 62 is attached to the attachment section 76, the plurality of bags 18 are hung on the centrifuge 14, and the channel 17 is attached to the rotor 78. Meanwhile, the blood donor is punctured with the blood sampling needle 15.
  • the cover body 77 is closed.
  • the cassette/tube assembly 62 is sandwiched between the cover body 77 and the attachment section 76, the pump operation sections 64 are set on the pumps 96, and the clamp operation sections 65 are arranged facing the clamps 92.
  • Fig. 2 when the user operates the centrifuge 14 to instruct the start of operation of the centrifuge 14, the centrifuge 14 transfers the ACD solution from the ACD solution bag 24 to the ACD solution line 45 in the cassette 22 through the tube 20a under action of the pump 96a, and further supplies the ACD solution to the blood sampling/retransfusion section 16, the introduction line 42, and the channel 17. Thus, blood coagulation in the circuit is prevented.
  • the centrifuge 14 rotates the rotor 78 to apply the centrifugal force to the channel 17 attached to the rotor 78, and actuates the blood sampling pump 96e to extract the blood (the whole blood) from the blood donor and introduce the blood into the channel 17 through the introduction line 42 and the introduction tube 46.
  • the blood introduced into the channel 17 is separated into the red blood cells, the buffy coat, and the plasma by the centrifugal force while circulating from the one end portion 17a to the other end portion 17b.
  • the red blood cells separated in the channel 17 are introduced to the first line 51 of the cassette 22 through the first lead tube 48a. Some of the red blood cells are introduced to the red blood cell bag 34 through the tube 20h, and the remaining red blood cells are introduced to the reservoir 47 through the tube 20g.
  • the centrifuge 14 opens the clamp 92f and closes the clamp 92e, thereby guiding the red blood cells to the red blood cell bag 34 through the flow path elements 51a, 51b. Further, the centrifuge 14 opens the clamp 92e and closes the clamp 92f, thereby guiding the red blood cells to the reservoir 47 through the flow path elements 51a, 51c, the tube 20g, and the flow path element 44b.
  • the plasma separated in the channel 17 is guided to the second line 52 of the cassette 22 through the second lead tube 48b under action of the pump 96c. Part of the plasma is introduced to the PPP bag 30 through the tube 20d, and the remaining plasma is introduced to the reservoir 47 through the tube 20f.
  • the centrifuge 14 opens the clamp 92a and closes the clamp 92d among the clamps 92 provided at the second line 52, thereby guiding the plasma to the PPP bag 30 through the flow path elements 52a to 52c.
  • the centrifuge 14 opens the clamps 92c, 92d and closes the clamps 92a, 92b, thereby guiding the plasma to the reservoir 47 through the flow path elements 52a, 52i, 52f, 52g, the tube 20f, and the flow path element 44a.
  • the buffy coat separated in the channel 17 is introduced to the concentrator 56 through the third lead tube 48c under action of the pump 96d, and then, is separated into the white blood cells and the platelet at the concentrator 56. Further, the separated platelet is guided to the second line 52 of the cassette 22 through the relay tube 58 under action of the pump 96d, and is introduced to the platelet bag 32 through the tube 20e.
  • the centrifuge 14 opens the clamp 92b and closes the clamps 92c, 92d among the clamps 92 provided at the second line 52, thereby guiding the platelet to the platelet bag 32 through the flow path elements 52e, 52f, 52h.
  • the platelet preservation solution (the PAS solution) in the platelet preservation solution bag 28 is guided to the second line 52 of the cassette 22 through the tube 20c under action of the pump 96c, and is supplied to the platelet bag 32 through the tube 20e.
  • the centrifuge 14 opens the clamps 92b, 92d and closes the clamps 92a, 92c among the clamps 92 provided at the second line 52, thereby guiding the platelet preservation solution to the platelet bag 32 through the flow path elements 52d, 52b, 52i, 52h.
  • the blood components (the red blood cells and the plasma) stored in the reservoir 47 are discharged from the reservoir 47 under action of the retransfusion pump 49 after the centrifugation processing, and then, are returned to the blood donor through the blood sampling/retransfusion section 16 (a retransfusion process).
  • the foreign material, such as coagulated blood clots, contained in the blood components having passed through the reservoir 47 is trapped by the filter member 60 provided at the retransfusion line 44, and therefore, a risk caused when the foreign material returns to the blood donor can be reduced.
  • the retransfusion process includes the priming process ( Fig. 9A ) of performing air venting from the reservoir 47, the inflow process ( Fig. 10A ) of causing the blood components to flow into the reservoir 47, the outflow process ( Fig. 11A ) of causing the blood components to flow out (discharge) from the reservoir 47, the re-inflow process ( Fig. 12A ) of causing the blood components to re-flow into the reservoir 47, the inflow/outflow repeating process ( Fig. 13A ) of repeatedly performing inflow and outflow of the blood components, and a termination process ( Fig. 14A ).
  • the reservoir 47 is, at the priming process, pressed by the pressing plate 49a, and in this manner, air is removed from the reservoir 47.
  • the ACD solution is introduced to the reservoir 47 under action of the pump 96a (see Fig. 2 ) while the pressing plate 49a is being moved to a position P1 for priming under drive action of the servomotor 49c.
  • the air in the reservoir 47 is discharged from the reservoir 47 (the air in the reservoir 47 is replaced with the ACD solution).
  • the discharged air flows through the tube 20b (see Fig. 2 ), and then, moves into the air bag 26 (see Fig. 2 ).
  • the inner pressure (the pressure detected by the reservoir pressure sensor 57) of the reservoir 47 is substantially constant at a low level at the priming process.
  • the pressing plate 49a is, at the inflow process, lowered (moved in the direction of separating the pressing plate 49a from the cover body 77), and accordingly, the blood components flow into the reservoir 47.
  • the pressing plate 49a is moved to a position P3 for inflow under drive action of the servomotor 49c.
  • the reservoir 47 is not sandwiched between the cover body 77 and the pressing plate 49a, and therefore, the blood components can flow into the reservoir 47 (the reservoir 47 can be expanded).
  • the pressing plate 49a is, at the outflow process, lifted (moved close to the cover body 77) to press the reservoir 47, and accordingly, the blood components flow out from the reservoir 47 toward the blood sampling/retransfusion section 16 ( Fig. 2 ).
  • the clamp 92g Fig. 2
  • the blood components flow out from the reservoir 47.
  • the control section 71 performs feedback control of the servomotor 49c based on the pressure detected by the reservoir pressure sensor 57. Specifically, the control section 71 controls, based on the pressure detected by the reservoir pressure sensor 57, operation of the retransfusion pump 49 (the servomotor 49c) such that the inner pressure of the reservoir 47 reaches a predetermined target pressure (see Fig. 11B ). The pressing plate 49a is moved to a position P2 for outflow.
  • the inner pressure of the reservoir 47 and the outflow speed (the flow rate) of the blood components from the reservoir 47 are proportional to each other.
  • the outflow speed of the blood components from the reservoir 47 can be accurately controlled, and the speed (the flow rate) of retransfusion to the blood donor can be maintained substantially constant.
  • Retransfusion to the blood donor is performed with a desired flow rate at a substantially constant speed.
  • the pressing plate 49a is, at the re-inflow process, lowered, and accordingly, the blood components re-flow into the reservoir 47.
  • the pressing plate 49a is moved to the position P3 as in the inflow process.
  • the re-inflow process is continued only for the predetermined set time, and therefore, the predetermined amount of blood components is stored in the reservoir 47.
  • the clamps 92h, 92g ( Fig. 2 ) are closed such that the blood components do not flow out from the reservoir 47.
  • the reservoir 47 is, at the re-inflow process, expanded in association with inflow of the blood components, and therefore, the inner pressure of the reservoir 47 is substantially constant at the low level as in the inflow process.
  • the above-described inflow process and the above-described outflow process are repeatedly performed at the inflow/outflow repeating process.
  • the pressing plate 49a is moved between the position P2 and the position P3 under drive action of the servomotor 49c.
  • the control section 71 performs feedback control of the servomotor 49c based on the pressure detected by the reservoir pressure sensor 57.
  • the pressure upon outflow is controlled to substantially constant every time.
  • the pressing plate 49a is, at the termination process, lowered to a position P4 as in Fig. 14A , thereby detaching the cassette 22 from the centrifuge 14.
  • the inner pressure of the reservoir 47 decreases as in Fig. 14B .
  • the cassette 22 of the present embodiment easier autoclave sterilization as compared to other types of sterilization processing (e.g., EOG sterilization) can be employed as sterilization processing upon manufacturing, leading to efficient manufacturing.
  • the cassette 22 can be manufactured by welding of the first sheet 38 and the second sheet 39 made of the soft materials, and therefore, can be manufactured at lower cost as compared to that of a typical cassette manufactured by injection molding and made of hard resin.
  • the cassette main body 23 is provided with the reservoir 47 pressed by the retransfusion pump 49 of the centrifuge 14 to discharge the blood components.
  • the centrifuge 14 it is not necessary to separately ensure a location for disposing the reservoir 47 and a location for providing the retransfusion pump 49, and therefore, device layout simplification and compactification are easily realized. That is, in the centrifuge 14, the location for disposing the reservoir 47 and the location for providing the retransfusion pump 49 are the same as each other, and a common space is used.
  • the cassette main body 23 has the sensor pressing section 61 configured to press the reservoir pressure sensor 57 equipped at the centrifuge 14.
  • the sensor pressing section 61 is provided at the retransfusion line 44, and therefore, the inner pressure of the reservoir 47 can be more precisely detected.
  • the reservoir 47 is molded by blow molding, and is expanded in the normal state. Thus, a desired reservoir capacity can be easily ensured.
  • the retransfusion pump 49 has the pressing plate 49a configured to press the reservoir 47 in the thickness direction.
  • the retransfusion pump 49 (a pressing plate type pump) having such a configuration, the substantially entirety of the reservoir 47 can be simultaneously pressed in the thickness direction, and therefore, desired solution transfer performance (the flow rate) can be easily obtained.
  • the centrifuge 14 has the reservoir pressure detection mechanism (the reservoir pressure sensor 57) configured to detect the inner pressure of the reservoir 47, and the control section 71 configured to control operation of the retransfusion pump 49 based on the pressure detected by the reservoir pressure detection mechanism.
  • the speed (the flow rate) of retransfusion to the blood donor can be accurately controlled.
  • the control section 71 controls operation of the retransfusion pump 49 such that the inner pressure of the reservoir 47 reaches the predetermined target pressure, and therefore, the speed of retransfusion to the blood donor can be maintained substantially constant.
  • This blood component sampling system 10B includes a blood sampling circuit set 12a having a blood component sampling cassette 22a (hereinafter referred to as a "cassette 22a"), and a centrifuge 14a (see Fig. 16 ) to which the blood sampling circuit set 12a is attached.
  • a blood component sampling cassette 22a hereinafter referred to as a "cassette 22a”
  • a centrifuge 14a see Fig. 16
  • the blood sampling circuit set 12a has a cassette main body 23a provided with a plurality of flow paths, and the cassette main body 23a is bonded such that a first sheet 38 and a second sheet 39 overlap with each other in a thickness direction and that the plurality of flow paths are formed.
  • the plurality of flow paths of the cassette main body 23 of the first embodiment include an introduction line 42, a blood component transfer line 43, a retransfusion line 44, and an ACD solution line 45.
  • Pump operation sections 118 on which pumps 120 of the centrifuge 14a operate are provided in a region on inflow sides of the plurality of flow paths (excluding the retransfusion line 44) at the cassette main body 23a.
  • the pump operation sections 118 are provided in an upstream region of the ACD solution line 45 and an upstream region of a second line 52 (upstream regions of flow path elements 52a, 52d, 52e).
  • a pump operation section 64 is expanded in a shape raised in the thickness direction of the cassette main body 23a in a normal state in which a positive pressure is not applied. Note that a downstream portion of the pump operation section 64 of the flow path formation portions at the cassette main body 23a is substantially flat in the normal state in which the positive pressure is not applied, but may be formed to expand in the raised shape when the positive pressure is applied.
  • an attachment section 76a of the centrifuge 14a includes the pumps 120 arranged at a cassette holding section 90 instead of the pumps 96 at the centrifuge 14 of the first embodiment.
  • Each pump 120 is configured to press the pump operation sections 118 of the cassette 22a held by the cassette holding section 90, thereby circulating liquid (blood components and the like) in the cassette 22a.
  • the pumps 120 are in the form of a finger pump 122 having a plurality of finger portions 124 (movable pressing bodies).
  • the plurality of finger portions 124 are configured to move back and forth in the thickness direction (a direction indicated by an arrow A) of the cassette 22a attached to the attachment section 76a.
  • the finger pump 122 sequentially shits, from right to left as viewed in Fig. 17 , a position at which the pump operation section 118 is crushed by the plurality of finger portions 124, and therefore, can circulate fluid in a direction indicated by an arrow B.
  • the positive pressure is applied to the downstream side of the pump 120 in each flow path (the ACD solution line 45, the second line 52) formed in the cassette main body 23a.
  • the cassette 22a can be, as in the cassette 22 of the first embodiment, efficiently manufactured at low cost, and no trouble is caused in transfer of fluid such as blood without closing the flow paths formed in the cassette main body 23a upon pump actuation. Further, according to the cassette 22a of the present embodiment, the pump operation sections 118 are automatically set on the pumps 120 when the cassette 22a is attached to the centrifuge 14a, and therefore, the cassette 22a can be more efficiently attached to the centrifuge 14a.
  • the blood has been described as a biological component, but the present disclosure is not limited to the blood.
  • the present disclosure is also applicable to various cells sampled or cultured from patients or donors, and medical liquid including medical agents to be administered to patients and the like.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Mechanical Engineering (AREA)
  • External Artificial Organs (AREA)
EP17777980.8A 2016-09-14 2017-09-12 Blood component sampling cassette, blood sampling circuit set, and blood component sampling system Active EP3512575B1 (en)

Applications Claiming Priority (2)

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JP2016179107 2016-09-14
PCT/JP2017/032886 WO2018051982A1 (en) 2016-09-14 2017-09-12 Blood component sampling cassette, blood sampling circuit set, and blood component sampling system

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EP3687593B1 (en) 2017-09-28 2023-04-05 Terumo Kabushiki Kaisha Biological component collection system and circuit internal pressure acquisition method
US11925741B2 (en) 2017-09-28 2024-03-12 Terumo Kabushiki Kaisha Biological component collection device with internal pressure sensor and method
WO2019188502A1 (en) * 2018-03-26 2019-10-03 Terumo Kabushiki Kaisha Biological component collection kit and biological component collection system
WO2019188501A1 (en) * 2018-03-26 2019-10-03 Terumo Kabushiki Kaisha Biological component treatment cassette and biological component treatment system
WO2019188505A1 (en) * 2018-03-26 2019-10-03 Terumo Kabushiki Kaisha Biological component collection system and flow path internal pressure acquisition method
EP3773793A1 (en) * 2018-03-26 2021-02-17 TERUMO Kabushiki Kaisha Biological component collection system and flow path internal pressure acquisition method
WO2019188500A1 (en) * 2018-03-26 2019-10-03 Terumo Kabushiki Kaisha Biological component treatment cassette and biological component treatment system
JP7355814B2 (ja) * 2018-11-01 2023-10-03 テルモ株式会社 生体成分採取システムおよび生体成分採取システムの作動方法
JP7355813B2 (ja) * 2018-11-01 2023-10-03 テルモ株式会社 生体成分採取システムおよび生体成分採取システムの作動方法
JP7461938B2 (ja) * 2019-02-01 2024-04-04 テルモ株式会社 生体成分移送システム
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WO2018051982A1 (en) 2018-03-22
US20190231949A1 (en) 2019-08-01
US11752243B2 (en) 2023-09-12
JP7187443B2 (ja) 2022-12-12
CN109715230A (zh) 2019-05-03
CN109715230B (zh) 2022-02-08
JP2019531121A (ja) 2019-10-31
EP3512575A1 (en) 2019-07-24

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